Honing tool



May 13, 1952 SMOLE 2,596,961

HONING TOOL Filed April 29, 1947 INVENTOR. JACK E SMOLE Patented May 13, 1952 HQNING men Jack FaSmole, Cleveland Heights; Ohio, assignor, c;'by:.lpesneaasgig te -Lemue :c .ucts

lncarfiedi rtQh a mra io of hi errl cafiqn-A n 2 9, 1947, Serial No. 7514,6913

rirdlaims. (c1. 51:15:4 .3

'QThe; present inventionrelates to hones; and

more particularly to expandable hones adapted to be driven by asuitable machine.

Anobj-ectof-the invention is to provide an expans ible- 'hone torhoning internal cylindrical surfaces,;which hone may be formed of few parts thatare inexpensive -to manufacture. and'assemble.

i 'An'otherobject' of the invention is to provide ahone of-thecharacter set forth in the preceding paragraplr in'whichv the stone members of the hone extend beyond other parts of the'hone mechanism so that honing canbe. performed to the closed end of a cylinder.

: A still turther object; of the. invention is. to provide a hone. which will feed oil to the-stones to ...carry away-particles formedin the honing operation in .aniimproved manner. :nflthenobjects and. advantages of the invention will begappa-rentfrom the following description of a-preferred; form of:the invention, reference being; made. to. the. accompanying drawings wherein;

Fig.1 is a view. in elevation of a hone embodying the invention;

Fig. 2 is aview 0fthe hone. shown in Fig. 1, with a .partthereofj in longitudinal section;

I" Eig. ,3 isan end view of the lower end of the hone of Fig. 1;

Ri 4 is asectiona iewt lien o th plane ATP-:4: 0t i e. 1;

:-.l". .s- 5. isa persp c e ew Q?- a etai er; Plat c.v.Ii-.:.thex hone of. gs. 1 a d 2-.the v ew gins-to enlarged scale;

.: .rli e i ira m arv ids ew 92 2 I e qirEi s-l and h wi g e re t n, .f .taiznnant .Q the qne. hen 1 he:

ed osit on; nd ions. s a i w sec i n i kenfr m-the Pl n -l-.-..' ofrF g- 2-.

Referring to the drawings, I have shown a 1 .11 1 .101.; mbo e ;mr n en m The 1c; Qm r ses a. man l ll, me Q a-s h lf a e n e1 9n; Xg= i h end portion [2; which is round and. partially threaded for attaching the hone in a socket of the drive shaft of a suitable hone driving machine, :not .shown.,.-I;n the present embodiment, the. mandrel l ;l isbored axially at [3. to approximately the middle cf; i eman r and-a ro We nt vsectsithe-hw r e i o .3- Th s q $9 .8 aznassa e. r. e i utt n Q1 p he 1-. mpair. ofa-stonecarriers, l6 are mountedon-the mandrekand suitable honing stones it}; are. attached to; the carriers. .Thecarriers. l6: are-pref?- --erablyformed of metal. stampings and are-channelw shaped-comprising spaced'sidewalls or flanges and a connecting wall. or webaand the sidewfianges of: the :channel straddle opposite sides of the. mandrel so the latter isnested within the. carriers and. relativerotation of the carriers and. mandrel is: prevented, and. the mandrel-may guide :longitudinalr. movement' of the carriers thereon. Theouter edges of the side: wallsror flanges of-th'e channeleshaped carriers have-inclined cam surfaces; 20: formed therein; which slope relative to the. edges of these side walls, the

angle of. slope loeingsimiiar for'al-l of' the; cam

viewed in the drawing; thecam surfaces engaging the cam pins; 21 will force the carriers-outwardly-laterally and cause expansion of the effective diameter of=the-hone stones l8. Thisex; pansion is-i -llustrated in Fig. 6. Likewise, upward -movement of the carriers will permit the carriers t move inwardly. and contract the hone diameten; When thehone diameter is contracted; as far as possible, I prefer to have a slight clearancespacebetween the mandrel and carriers at the surfaces indicated at 23 to provide anioil passage. v

'The, carriers t6" are resiliently urged inwardly and upwardlyto minimum diameter positions by a tension spring 24- which is disposed in an axial bore 25 in the mandrel. The inner end of the spring; is looped and a pin- 21 disposed in-an opening through the mandrel. and intersecting bore-Zi-extendsthrough the loop for anchoring thBSQIEiIIg; The opposite end of the spring is connected to a V-shaped retaining plate 30. The outer-end of the spring is looped'and a wire 31 extendsacross an opening 32 through the center ofplate 31 0. and the central portion of the wire s en ag db the oo d n of thespr n Preierably. th ac nt al porti n. of the-wir isofiset; to form, a notch for; holding'the springand for-engaging-theedgesof'the opening 32 toprevent: accidental: displacement. ofthewire from engagement with-the; plate.

The; ends; of the side walls or flanges of the channel shaped carriers it, ar each cut off at n n l nat n. as; indica a wsee. F o de ne'i intly he r l a ec p di o hatrouhe. V-shan r tain n la 341-.-

opposite edges of the plate are offset to form flanges in which the lower end edges 34 of the carriers I6 are seated, to prevent shifting of the plate 30 on the ends of the ends of the carriers. It will be understood that the tension on spring 24 draws plate 30 tightly against the ends of the carriers I6 and the plate tends to cam the carriers inwardly toward each other at their lower ends. It will be noted that by thus cutting off the channel flanges, shorter than the channel webs of the carriers on which the stones I8 are mounted, the honing stones can extend and be supported below the plate 30 and thereby in use may engage and work the inside of a closed end cylinder all the way to the end of the cylinder.

The position of the stone carriers longitudinally of the mandrel I I may be adjusted by longitudinal movement of a sleeve 40, having an axial opening therethrough that is square in cross section to accommodate the mandrel I I. The lower end 41 of the sleeve'40 is concavely V-shaped providing a dihedral angle thereat and the upper end edges 34A of the carriers l6 are inclined to define jointly a similar dihedral angle therebetween. The carriers are yieldably held in contact with the sleeve by the spring 24. As the sleeve is moved downwardly, it causes the carriers to be moved outwardly laterally by the cam surfaces 20 and pins 2 I; and as the sleeve is returned upwardly, the upper ends of the carriers are cammed inwardly toward each "other by the V-shape of the sleeve. The upper end of the sleeve 40 abuts a collar 42, which is rotatively mounted on the mandrel I I by a suitable thrust I bearing, not shown. .The thrust bearing is interposed between the sleeve and collar to permit free rotation of the collar relative to the sleeve while also permitting the collar to move the sleeve longitudinally on the mandrel. One race of the thrust bearing may be seen at 43. The collar 42 may be adjusted longitudinally on the mandrel by a member on the hone driving machine not shown, which member may consist of a longitudinally movable sleeve surrounding the drive shaft of the machine and engaging the collar. Suitable stops, not shown, may be provided to prevent the collar from being accidentally removed from the mandrel while the hone is not in use. From the foregoing, it will be seen that the spring 24 holds both the upper and lower ends of the stone carriers I6 toward each other to keep the cam surfaces 20 contacting the pins 2I; and also yields upon expanding the hone diameter and tends at all times to contract it.

During the honing operation, cutting oil may be fed to the hone through passages I3 and I4 and the oil will move toward the stone carrying end of the mandrel between the mandrel and stone carriers in the passages or spaces 23. Grooves 45 are milled in the sides of the mandrel to feed the oil from the spaces 23 to the sliding contact between the mandrel and the side walls or flanges of the channels, and whence it flows to the cam follower pins 2| and cam surfaces 20, and lubricates these parts. In order to provide oil feed when the sleeve 40 comes opposite to the outlets of the bore l4, grooves 46 are cut in the mandrel and these grooves extend beyond the range of movement of the sleeve in the hone expanding direction so that oil can be supplied to the/spaces or conduits 23 through the grooves 46. The rotation of the hone will throw the oil outwardly on the surface being honed. Thus,

oil will be distributed substantially lengthwise of the hone to assure thorough washing of the work surface, and the boring of the mandrel to supply the oil will be at a minimum.

It will be noted that the V-shaped surface 41 of the sleeve 40 fits upon and covers the upper ends of the carriers, and therefore blocks off the upper ends of the oil conduits or spaces 23, so that oil is constrained to flow downwardly to the working parts.

It will be seen that my hone is made of relatively few parts which can be easily fabricated so .that an inexpensive and highly satisfactory honing tool is provided.

Although I have described but one form of the invention, other forms might be adopted, all falling within the scope of the claims which follow.

I claim:

1. A hone comprising an elongated mandrel body; projections on opposite sides of the body constituting cam followers; two oppositely disposed channel shaped stone carriers, each comprising spaced side walls and'a connecting wall therebetween; the stone carriers extending along opposite sides of said body and the body being nested therebetween; stones mounted on the connecting walls of the carriers respectivelyysaid stone carriers each having one end thereof, "extending beyond one end of said body and having tapered surfaces intermediate their ends on the side walls thereof engaging said projections, *respectively, whereby said carriers are cammed radially relative to the body when relative longitudinal movement is effected between the body and carriers; and the ends of the side walls at said end of the carriers, being inclined to define a convex dihedral angle; and means'forurging said carriers at said end inwardly toward each other comprising a V-shape plate, having a concave dihedral angle between its V-legs corresponding to the dihedral angle of the carrier sides, and said body having an axial opening therein extending from said end of the body in- \vardly, and a tension spring having one end anchored in said opening and'connected at the other end to the central portion of said plate for urging the V-legs of the plate into engagement with said side wall inclined ends. i 7

2. A hone of the'character defined in claim 1, in which the stones and the connecting walls of the carriers on which they are mounted extend beyond the end of the mandrel body'and beyond the V-shaped plate. g

3. A hone of the character defined in claim 1 in which the projections on the mandrel body are provided by pins extending-through transverse openings through the body and the axial opening in the body comprises a bore extending axially of the body, and the axis of which intersects at least one of the pins.

4. A hone of the character defined in claim 1, in which the V-shaped plate has two opposed edge portions offset from the intermediate portionof the plate and engaging said inclined side wall ends. r

5. A hone comprising, an elongated mandrel havingopposite parallel faces; one side of the mandrel nested in an'elongated channel form stone carrier, supporting a stone; the carrier comprising spaced side walls having portions in sliding engagement respectively withsaid opposite mandrel faces; and comprising a connecting wall spaced from the side of the mandrel, the space constitutingan oil conduit longitudinally of the mandrel; mechanism assembled withthe mandrel and the carrier operable to reciprocate the carrier longitudinally of the mandrel and concurrently transversely thereof; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said longitudinal oil conduit.

6. A hone comprising an elongated mandrel having opposite parallel faces; one side of the mandrel nested in an elongated channel form stone carrier, supporting a stone; the carrier comprising spaced side walls having portions in sliding engagement respectively with said opposite mandrel faces; and comprising a connecting wall spaced from the side of the mandrel, the space constituting an oil conduit longitudinally of the mandrel; mechanism operable to reciprocate the carrier longitudinally of the mandrel and concurrently transversely thereof; the mechanism comprising an element reciprocable on the mandrel, and, at one end of the carrier, engaging the side walls and connecting wall and substantially blocking the said conduit at that end; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said 1ongitudinal oil conduit.

space constituting an oil conduit longitudinally of the mandrel; mechanism assembled with the mandrel and the carrier operable to reciprocate the carrier longitudinally of the mandrel and concurrently transversely thereof; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said longitudinal oil conduit; the mandrel having an oil channel in its outer surface communicating between said oil conduit and the channel side walls at their said sliding engagement.

8. A hone comprising an elongated mandrel having opposite parallel faces; opposite sides of the mandrel being nested respectively in a pair of elongated channel-form stone carrier, each supporting a stone; each carrier comprising spaced side walls having portions in slidable engagement respectively with said opposite mandrel faces, and comprising a connecting wall spaced from the mandrel, the spaces thus provided constituting oil conduits longitudinally of the mandrel; mechanism assembled with the mandrel and the carriers operable to reciprocate the carriers in unison on the mandrel, and concurrently oppositely transversely thereof; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said longitudinal oil conduits.

9. A hone comprising an elongated mandrel having opposite parallel faces; opposite sides of the mandrel being nested respectively in a pair of elongated channel-form stone carriers, each supporting a stone; each carrier comprising spaced side walls having portions in slidable engagement respectively with said opposite mandrel faces, and comprising a connecting wall spaced from the mandrel, the spaces thus provided constituting oil conduits longitudinally of the mandrel; mechanism operable to reciprocate the carriers in unison on the mandrel and concurrently oppositely transversely thereof; the mechanism comprising an element reciprocable on the mandrel, and, at one end of the carriers, engaging the side walls and connecting walls and substantially blocking the said oil conduits at that end; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said longitudinal oil conduits.

10. A hone comprising an elongated mandrel having opposite parallel faces; opposite sides of the mandrel being nested respectively in a pair of elongated channel-form stone carriers, each supporting a stone; each carrier comprising spaced side walls having portions in slidable engagement respectively with said opposite mandrel faces, and comprising a connecting wall spaced from the mandrel, the spaces thus provided constituting oil conduits longitudinally of the mandrel; mechanism assembled with the mandrel and the carriers operable to reciprocate the carriers in unison on the mandrel, and concurrently oppositely transversely thereof; the mandrel having an internal longitudinal oil supply duct therein, opening laterally into said longitudinal oil conduits; the mandrel having a substantially circumscribing oil channel in its outer surface communi-- eating between said oil conduits and the channel side walls at their said sliding engagement.

11. A hone comprising an elongated mandrel having pairs of opposite parallel faces; and a plurality of stone carriers each comprising a stone supporting portion supporting an elongated stone extending along the side of the mandrel, and the stones formed to jointly provide a surface for working the wall of a hollow cylinder; each carrier having portions formed to embrace therebetween a side portion of the mandrel and the portions having opposite surfaces slidingly engaging a said parallel pair of mandrel faces; the, mandrel formed at one end to be mounted on a rotary machine spindle to be rotated thereby; and at the other end the stone carriers and stones having free ends for insertion into a cylin drical hole to work the wall thereof; the engagement of the carrier surfaces and the parallel mandrel faces guiding the carriers for longitudinal reciprocatory movement and opposite transverse reciprocatory movement on the mandrel; mechanism operable to effect said longitudinal movement and mechanism causing said transverse movement to occur concurrently with said longitudinal movement comprising cam followers extending from said mandrel faces and cam surfaces on said mandrel-embracing portions of the carriers engaged with the cam followers; the carriers also provided at opposite ends thereof with surfaces inclined to the axis of the mandrel, and mechanism comprising spring actuated means exerting axially directed thrust upon the inclined surfaces and thereby yieldingly holding the carriers toward the mandrel; the said mechanisms and the said inclined surfaces and the said spring actuated means all being disposed axially inwardly of the free ends of the stones.

JACK F. SMOLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 959,273 Turney May 24, 1910 1,910,659 Tydeman May 23, 1933 2,332,463 Palotsee Oct. 19, 1943 2,412,419 Palotsee Dec. 10, 1946 2,443,268 Palotsee June 15, 1948 

